Extra strength backing stud having notched flanges

ABSTRACT

Disclosed herein is an elongated C-shaped backing stud having a plurality of receiving notches positioned along its outer flanges. The backing stud is fastened to the studs of a sheet metal wall assembly by means of a plurality of fasteners, and such that the plurality of studs of the wall assembly abuts a planar web portion of the backing stud. The backing stud may be characterized in that (i) the ratio of the width of the web portion to the width of the backing stud flanges ranges from about 8 to 16, (ii) the ratio of the width of the backing stud flanges to width of the outer returns is at least about one, and (iii) the ratio of the width of the plurality of studs to the width of the outer returns ranges from about 6 to 8. The backing stud is configured to support wall hung grab bars, hand rails, cabinets, shelves, and the like.

TECHNICAL FIELD

The present invention relates generally to building construction and,more specifically, to structural sheet metal backing studs or membersfor supporting wall hung grab bars, hand rails, cabinets, shelves, andthe like. The extra strength sheet metal backing stud of the presentinvention allows for a secure attachment and support for objects thatplace a load on a wall assembly and/or wall sheathing.

BACKGROUND OF THE INVENTION

Framing associated with building walls has historically been assembledfrom wooden members, including wooden studs and beams. In more recentyears, however, the use of metal studs together with confrontingchanneled track members has gained wide acceptance, especially in newcommercial buildings such as office buildings. Generally speaking, metalstuds and track members are stronger, more resistant to fire andeconomical than their wooden counterparts.

Metal studs are typically formed of galvanized sheet-metal bent toencompass a cross sectional area having nominal dimensions of two inchesby four inches. To conform to modern architectural plans and buildingcode requirements, metal studs are formed of sheet-metal bent into agenerally U-shaped cross-section in which a relatively broad centralbase is flanked by a pair of narrower sides that are bent at rightangles relative to the base. The central base typically has a uniformnominal width of either three and ⅝ or four inches and is commonlyreferred to as the web. The sides of the U-shaped stud typically extendoutwardly from the base a nominal distance of two inches and arecommonly referred to as flanges. In order to enhance the structuralrigidity of the flanges, the ends of flanges are typically bent overinto a plane parallel to and spaced apart from the plane of the web. Theturned over edges of the flanges define marginal returns or lips thatare typically ¼ to ½ inch in width.

During the framing of building walls, it is common practice to positionwall studs at regularly spaced apart intervals relative to one another.For example, it is common practice to vertically position wall studs at16 inches from center intervals. In addition, there is often a need forthe studs to be transversely braced together, thereby providing enhancedstructural rigidity to the frame-assembly. For example, studs over eightfeet in length are generally transversely braced together to ensureadequate lateral stability of the wall structure. Exemplary devices thatassist with the proper spacing and bracing of at least metal studsinclude those devices disclosed in U.S. Pat. No. 1,867,449 to Ecket etal. (discloses a metal fire block, bridging, and bracing element), U.S.Pat. No. 5,274,973 to Liang (discloses a notched stud spacer andmounting system), U.S. Pat. No. 6,021,618 to Elderson (discloses anotched stud spacer), U.S. Pat. No. 6,164,028 to Hughes (discloses ametallic bridging member), U.S. Pat. No. 6,983,569 to Rosenberg(discloses a notched stud spacer and bracing member together with a wallframing system), and U.S. Patent Application Publication No. 2007/023471to Klein (discloses corrugated bracing strip). A problem associated withmany of these devices is that they do not allow or accommodate for theplacement of common in-wall plumbing and piping without additionalcutting.

Although advances have been made over the years with respect to backing,spacing and bracing elements and systems used in wall assemblies, thereis still a need in the art for new and improved framing elements thatcan be used as a backing, spacing, and cross-connecting bracing memberin a wall assembly of a building. The present invention fulfills theseneeds and provides for further related advantages.

SUMMARY OF THE INVENTION

The present invention is directed to an extra strength backing stud andrelated wall assembly that consists essentially of: a plurality of sheetmetal studs mounted upright at laterally and uniformly spaced intervalsand between confronting footer and header tracks, each of the pluralityof sheet metal studs having an outer flange surface coplanar with theouter flange surfaces of the other studs; an elongated C-shapedsheet-metal backing stud configured to support a wall-mounted fixtureand horizontally engaged with the plurality of studs such that the outercoplanar flange surfaces of the plurality of studs abuts a planar webportion of the backing stud, with the web portion being flanked alongits opposing horizontal edges by confronting and inwardly directedbacking stud flanges, and with each backing stud flange beingperpendicular to the web portion and having outer returns parallel tothe web portion and confronting each other thereby defining a generallyC-shaped cross-section profile, the elongated C-shaped backing studfurther including a plurality of receiving notches positioned atlaterally spaced apart intervals, with the plurality of studs beingreceived into the plurality of receiving notches, the elongated C-shapedbacking stud being further characterized in that (i) the ratio of thewidth of the web portion to the width of the backing stud flanges rangesfrom about eight to 16, (ii) the ratio of the width of the backing studflanges to width of the outer returns is at least about one, and (iii)the ratio of the width of the plurality of studs to the width of theouter returns ranges from about six to eight; and a plurality offasteners positioned along the elongated backing stud transverse fromthe plurality of studs.

These and other aspects of the present invention will become moreevident upon reference to the following detailed description andattached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings are intended to be illustrative and symbolicrepresentations of certain exemplary embodiments of the presentinvention. For purposes of clarity, like reference numerals have beenused to designate like features throughout the several views of thedrawings.

FIG. 1 illustrates a side perspective view of a section of a wallassembly in accordance with an embodiment of the present invention,wherein the wall assembly comprises a plurality of sheet metal studs anda backing stud (shown being spaced apart from the studs).

FIG. 2 illustrates a side perspective view of the section of the wallassembly of FIG. 1, but where the backing stud is engaged with thestuds.

FIG. 3 illustrates a side view of a backing stud in accordance with anembodiment of the present invention.

FIG. 4 illustrates a front perspective view of an isolated backing studin accordance with an embodiment of the present invention.

FIG. 5 illustrates a back perspective view of the isolated backing studof FIG. 4.

FIG. 6 illustrates a wall assembly in accordance with an embodiment ofthe present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring now to the drawings wherein like reference numerals designateidentical or corresponding elements, and more particularly to FIGS. 1through 6, the present invention in one embodiment is directed to asheet metal wall assembly 10. As shown, the wall assembly 10 includes aplurality of sheet metal studs 12 mounted upright at laterally spacedintervals and between confronting footer 16 and header tracks 14. Eachstud 12 includes an outer flange surface 18 that is substantiallycoplanar with the outer flange surfaces 18 of the other studs 12. Thesheet metal wall assembly 10 further includes an elongated C-shapedsheet metal backing stud 20 that is configured to support a wall-mountedfixture such as, for example, a grab bar, a hand rail, cabinetry,shelving, and the like (not shown). As best shown in FIG. 2, the backingstud 20 is horizontally engaged with the plurality of studs 12 such thatthe outer coplanar flange surfaces 18 of the plurality of studs 12 abuta planar web portion 22 (having a width is w) of the backing stud 20.The web portion 22 of the backing stud 20 is flanked along its opposinghorizontal edges 24 by confronting and inwardly directed backing studflanges 26. Each backing stud flange 26 (having a width x) issubstantially perpendicular to the web portion 22 of the backing stud20. In addition, the flanges 26 have outer returns 38 (having a width y)substantially parallel to the web portion 22 and confronting each otherthereby defining a generally C-shaped cross-section profile (as bestshown in FIG. 3).

The elongated C-shaped backing stud 12 further includes a plurality ofreceiving notches 28 positioned at laterally spaced apart intervals,with the plurality of studs 12 being received into the plurality ofreceiving slots 28. A plurality of fasteners 30 are positioned along theelongated backing stud 20 transverse from the plurality of studs 12 tothereby fasten the backing stud 20 to the plurality of studs 12 of thewall assembly 10. The elongated C-shaped backing stud 12 may be furthercharacterized in that (i) the ratio of the width of the web portion w tothe width of the backing stud flanges x ranges from about eight to 16(w/x), (ii) the ratio of the width of the backing stud flanges x towidth of the outer returns y is at least about one (x/y), and (iii) theratio of the width of the plurality of studs w to the width of the outerreturns y to the ranges from about six to eight (w/y). In thisconfiguration, the wall assembly 10 is able to accommodate standardplumbing and piping within the wall assembly (and is able to do sowithout any cutting of the backing stud 20 because it is appropriatelydimensioned).

For purposes of illustration and not limitation, the following Tablesprovide additional disclosure of the present invention.

TABLE 1 Backing Stud with 1 Inch Backing Stud Flange SpecificationALLOWABLE SECTION PROPERTIES - PER AISI DESIGN CRITERIA STEELTEC ESBDEPTH FLANGE Fy Ixe (min) Sxe (min) Iye (min) Sye (min) MEMBER GA MIL(IN) (IN) (KSI) (IN³) (IN³) (IN³) (IN³) 4-INCH, 20 GA 20 33 4 1.00 330.522 0.261 0.033 0.046 4-INCH, 18 GA 18 43 4 1.00 33 0.672 0.336 0.0410.058 4-INCH, 16 GA 16 54 4 1.00 50 0.823 0.411 0.050 0.070 4-INCH, 14GA 14 68 4 1.00 50 1.003 0.501 0.059 0.082 6-INCH, 20 GA 20 33 6 1.00 331.371 0.445 0.036 0.047 6-INCH, 18 GA 18 43 6 1.00 33 1.816 0.605 0.0460.060 6-INCH, 16 GA 16 54 6 1.00 50 2.236 0.745 0.056 0.072 6-INCH, 14GA 14 68 6 1.00 50 2.742 0.914 0.066 0.085 8-INCH, 20 GA 20 33 8 1.00 332.687 0.626 0.037 0.047 8-INCH, 18 GA 18 43 8 1.00 33 3.610 0.872 0.0480.060 8-INCH, 16 GA 16 54 8 1.00 50 4.492 1.092 0.058 0.072 8-INCH, 14GA 14 68 8 1.00 50 5.690 1.423 0.070 0.086

TABLE 2 Backing Stud with ½ Inch Backing Stud Flange SpecificationALLOWABLE SECTION PROPERTIES - PER AISI DESIGN CRITERIA Backing Studwidth (w) DEPTH FLANGE Fy Ixe (min) Sxe (min) Iye (min) Sye (min)thickness GA MIL (IN) (IN) (KSI) (IN³) (IN³) (IN³) (IN³) 4-INCH, 20 GA20 33 4 0.50 33 0.386 0.193 0.007 0.018 4-INCH, 18 GA 18 43 4 0.50 330.495 0.248 0.008 0.022 4-INCH, 16 GA 16 54 4 0.50 50 0.603 0.301 0.0090.025 4-INCH, 14 GA 14 68 4 0.50 50 0.728 0.364 0.011 0.029 6-INCH, 20GA 20 33 6 0.50 33 1.085 0.357 0.007 0.018 6-INCH, 18 GA 18 43 6 0.50 331.416 0.472 0.009 0.022 6-INCH, 16 GA 16 54 6 0.50 50 1.736 0.579 0.0100.026 6-INCH, 14 GA 14 68 6 0.50 50 2.116 0.705 0.012 0.030 8-INCH, 20GA 20 33 8 0.50 33 2.214 0.526 0.007 0.018 8-INCH, 18 GA 18 43 8 0.50 332.989 0.738 0.009 0.022 8-INCH, 16 GA 16 54 8 0.50 50 3.727 0.932 0.0110.026 8-INCH, 14 GA 14 68 8 0.50 50 4.569 1.142 0.012 0.030

While the present invention has been described in the context of theembodiments illustrated and described herein, the invention may beembodied in other specific ways or in other specific forms withoutdeparting from its spirit or essential characteristics. Therefore, thedescribed embodiments are to be considered in all respects asillustrative and not restrictive. The scope of the invention is,therefore, indicated by the appended claims rather than by the foregoingdescription, and all changes that come within the meaning and range ofequivalency of the claims are to be embraced within their scope.

1. An extra strength backing stud, comprising: an elongated C-shapedsheet-metal backing stud configured to support a wall-mounted fixtureand horizontally engage a plurality of studs, the backing stud having aplanar web portion flanked along its opposing horizontal edges byconfronting and inwardly directed backing stud flanges, each backingstud flange being perpendicular to the web portion and having outerreturns parallel to the web portion and confronting each other therebydefining a generally C-shaped cross-section profile, the elongatedC-shaped backing stud further including a plurality of receiving notchespositioned at laterally spaced apart intervals, the elongated C-shapedbacking stud being further characterized in that (i) the ratio of thewidth of the web portion to the width of the backing stud flanges rangesfrom about 8 to about 16, (ii) the ratio of the width of the backingstud flanges to width of the outer returns is at least about one, and(iii) the ratio of the width of the plurality of studs to the width ofthe outer returns ranges from about 6 to about
 8. 2. A wall assemblyconsisting essentially of: a plurality of sheet metal studs mountedupright at laterally and uniformly spaced intervals and betweenconfronting footer and header tracks, each of the plurality of sheetmetal studs having an outer flange surface coplanar with the outerflange surfaces of the other studs; and an elongated C-shapedsheet-metal backing stud configured to support a wall-mounted fixtureand horizontally engaged with the plurality of studs such that the outercoplanar flange surfaces of the plurality of studs abut a planar webportion of the backing stud, with the web portion being flanked alongits opposing horizontal edges by confronting and inwardly directedbacking stud flanges, and with each backing stud flange beingperpendicular to the web portion and having outer returns parallel tothe web portion and confronting each other thereby defining a generallyC-shaped cross-section profile, the elongated C-shaped backing studfurther including a plurality of receiving notches positioned atlaterally spaced apart intervals, with the plurality of studs beingreceived into the plurality of receiving notches, the elongated C-shapedbacking stud being further characterized in that (i) the ratio of thewidth of the web portion to the width of the backing stud flanges rangesfrom about 8 to about 16, (ii) the ratio of the width of the backingstud flanges to width of the outer returns is at least about one, and(iii) the ratio of the width of the plurality of studs to the width ofthe outer returns ranges from about 6 to about 8; and a plurality offasteners positioned along the elongated backing stud transverse fromthe plurality of studs.